On an invoice, “Net 10th” means the full balance is due on the 10th day of the month after the invoice was issued. So what does Net 10th mean in practice? An invoice dated anywhere in January is due February 10th. One dated anywhere in March is due April 10th. The due date is anchored to a calendar date, not to a countdown from the invoice, which is why the actual credit window can range from about 10 days to about 40 days depending on when in the month the invoice was created.
You’ll sometimes see the term written as “Net 10th Prox,” short for the Latin proximo, meaning “next month.” “Net” simply means the entire invoice amount is owed, with no early-payment discount built in.
How the Due Date Is Calculated
The math is straightforward: ignore the day of the month on the invoice and jump to the 10th of the following month. Every invoice generated in a given month shares one due date, which is the whole point. The seller collects on a single predictable day; the buyer gets a predictable payment cycle.
What varies is how much credit any one invoice actually gives you:
- Invoice dated January 1st: due February 10th. About 40 days of credit, the longest window possible.
- Invoice dated January 15th: due February 10th. About 26 days.
- Invoice dated January 31st: due February 10th. Only 10 days, the shortest window.
A March 29th invoice leaves you roughly 12 days total. A March 1st invoice leaves you close to 40. Sellers sometimes issue invoices on the last day of a month specifically because it shortens the buyer’s credit period.
The Split-Month Variation
Many businesses don’t use the simplest form. Instead they run a mid-month cut-off, most commonly structured this way:
- Invoices dated the 1st through the 15th are due on the 10th of the following month.
- Invoices dated the 16th through the end of the month are due on the 25th of the following month.
This is often written “Net 10th and 25th Prox.” It creates two payment cycles per month and smooths out the credit-window squeeze. Without the cut-off, a buyer invoiced on the 28th gets 12 days. With the 25th-of-next-month fallback, the same buyer gets closer to 28.
If a vendor’s invoice just says “Net 10th” without specifying a cut-off, ask. Two weeks of misunderstanding is enough to trigger a late fee.
When the 10th Falls on a Weekend or Holiday
The standard commercial expectation is that payment is due the next business day. Federal procurement rules make this explicit: when a due date falls on a non-business day, paying on the following working day does not trigger a late-payment penalty.1Acquisition.GOV. 52.232-25 Prompt Payment Private-sector contracts generally follow the same convention, though the specifics come from the seller’s terms of sale. If you’re unsure, pay before the weekend.
How Net 10th Compares to Other Payment Terms
Knowing the alternatives helps you tell whether a vendor’s terms are generous, standard, or unusually tight.
Net 30, Net 60, and Net 90
These are the most common B2B terms. Each starts a fixed countdown from the invoice date, so the credit window is always the same length no matter when in the month the invoice was cut. Simpler to track for a single invoice, less convenient for batching payments on one date.
End of Month
EOM terms make payment due on the last day of the month following the invoice date. A March 15th invoice would be due April 30th. Because every month ends later than the 10th, EOM almost always gives the buyer a longer window than Net 10th. “Net 30 EOM” extends it further, adding 30 days after the end of the invoice month.
Early-Payment Discounts
A term like “2/10 Net 30” lets the buyer take a 2% discount by paying within 10 days, or pay the full amount within 30 days.2J.P. Morgan. How Net Payment Terms Affect Working Capital Plain Net 10th terms rarely include a discount, since the structure already batches payments on a fixed date.
What Happens if You Pay Late
The first consequence is the late fee or interest charge in the vendor’s terms of sale. Rates vary widely; state usury limits on commercial debts run from around 5% to as high as 60% APR depending on jurisdiction and loan amount, so there’s no single national cap. A 1.5% monthly charge is 18% annually on the unpaid balance.
Repeated late payments usually prompt the vendor to tighten your credit. Expect a shift to Cash on Delivery or upfront deposits on future orders. Losing trade credit ties up working capital that could be deployed elsewhere.
Accounts that stay delinquent long enough get reported to commercial credit agencies. Dun & Bradstreet’s PAYDEX Score, on a scale from 1 to 100, is the metric other suppliers and lenders check most often. A score of 80 or above signals low risk; below 50 flags high risk of late payment.3Dun & Bradstreet. Business Credit Scores and Ratings Rebuilding takes time, because the score reflects two years of payment history.4Dun & Bradstreet. How to Read Dun and Bradstreet Business Credit Reports
Year-End Timing for Accrual-Basis Buyers
If your business uses accrual accounting, the gap between invoice date and payment date can straddle your fiscal year. Under accrual rules the seller records revenue when the right to payment is fixed and the amount can be determined, not when cash arrives.5Office of the Law Revision Counsel. 26 US Code 451 – General Rule for Taxable Year of Inclusion For the buyer, the expense is recognized when the goods or services are received, regardless of when the check clears.
So if your fiscal year ends December 31st and you receive a Net 10th invoice dated December 20th, the expense belongs to the current tax year even though payment isn’t due until January 10th. Cash-basis businesses don’t face this timing issue, because they record transactions only when money changes hands. If you’re not sure which method applies, ask your accountant before year-end invoices start arriving.